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Baseline values of categorical independent variables
| Variables | n | % |
| Logistic model | ||
| sex (male) | 585 | 49 |
| sex (female) | 607 | 51 |
| Linear model | ||
| sex (male) | 504 | 50 |
| sex (female) | 512 | 50 |
| Geographical types | ||
| Urban slum | 225 | 19 |
| Rural plain/rural slum | 305 | 26 |
| Rural mountain | 487 | 41 |
| Coastal/fishing | 175 | 15 |
